Such a pity that they had to compress two seasons worth of story into one and when they wanted to do more, their giant Rome set burned down (ironic though it is).
Die Tyrannei des Schmetterlings (the tyranny of the butterfly) by German author Frank Schätzing. A sci-fi thriller in the same vein as John Chrichton about AI and quantum physics. A great page turner, although the flowery language sometimes comes across as a bit forced.
I can't speak for Italy, but Nazi Germany would have collapsed anyway. The whole system was entirely dependent on lots of foreign lending that Hitler had no Intention on paying back. He had also pissed off pretty much all international trade partners.
Germans as a whole were a lot worse off than before Hitler gained power, working a lot more for a lot less, with shortages of everyday goods left and right.
It's not even that climate measures are costly, they're a net positive in the long run! But nobody is interested in the long run, because the filthy rich live in an alternate universe where they will live forever in luxury far away from the filth of the rest of us.
The sci-fi book Children of Ruin (sequel to Children of Time) covers this somewhat. There humans encounter a planet with a breathable atmosphere but with a toxic environment that slowly kills them.
This is the (jane)way!